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| Section | Weight | Objectives |
|---|---|---|
| Science | 38% | - Chemistry
|
| Verbal Ability | 34% | - Word Knowledge
|
| Mathematics | 28% | - Measurement
|
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問題 #31
Which of the following bones form the ball-and-socket joint of the upper extremity?
答案：B
解題說明：
The ball-and-socket joint of the upper extremity is the shoulder joint. This joint is formed by the head of the humerus (the ball) fitting into the glenoid cavity of the scapula (the socket). This structure allows for a wide range of motion, including flexion, extension, abduction, adduction, and rotation. The ribs do not participate in this joint, and the clavicle connects the scapula to the sternum but does not form the ball-and-socket articulation. Understanding joint structure and function is important for anatomy questions on the NEX Science exam. The shoulder joint's design allows greater mobility than stability, which explains why shoulder dislocations are relatively common.
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問題 #32
A financial counselor is reviewing the annual tax refunds received by a group of clients. The refunds are shown below:
$500, $857, $1,500, $500, $6,753, $2,500, $3,000
What is the median tax refund?
答案：B
解題說明：
This question assesses understanding of the median, which is the middle value when data are ordered from least to greatest. First, list the refunds in ascending order:
$500, $500, $857, $1,500, $2,500, $3,000, $6,753.
There are seven values total, so the median is the fourth value in the ordered list. The fourth value is $1,500.
Therefore, option D is correct. Option B represents the mode (most frequent value), not the median. Options A and C are averages or midpoints that do not correspond to the true median position. On the NEX exam, students are frequently tested on distinguishing mean, median, and mode, so remembering that the median is strictly positional-not calculated-is essential.
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問題 #33
Review the image below.
In which part of the spinal column are the vertebrae depicted by bracket B located?
答案：B
解題說明：
This question tests knowledge of spinal anatomy and the ability to interpret labeled diagrams, which is common on the NEX Science exam. The vertebral column is divided into regions: cervical (neck), thoracic (upper and mid-back), lumbar (lower back), sacral, and coccygeal regions. In the image, bracket B corresponds to the long middle portion of the spine where ribs attach. This region contains the thoracic vertebrae, which are larger than cervical vertebrae but smaller than lumbar vertebrae and are uniquely characterized by rib articulation. The sacral region is located below the lumbar spine and consists of fused vertebrae, while the cervical region is at the top of the spine near the skull. The lumbar region is shorter and thicker, designed to support body weight. Because bracket B shows the rib-bearing portion of the spine, the correct answer is thoracic. The NEX often assesses spatial understanding of skeletal structures using diagrams.
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問題 #34
An employee receives notification that their job is being eliminated. Upon hearing the news, the employee bangs a fist on the worktable and shouts loud curses and insults about management.
This reaction corresponds to which stage of the stress response pathway?
答案：C
解題說明：
The alarm stage is the initial reaction to a stressor and is characterized by emotional outbursts, increased heart rate, and release of stress hormones such as adrenaline. The employee's immediate anger and physical reaction reflect this stage. The resistance stage involves adaptation, and exhaustion occurs after prolonged stress. "Failure" is not a recognized stage of the stress response. The NEX Science exam frequently tests physiological and psychological responses to stress, making alarm the correct answer.
問題 #35
What is the term used to describe random changes in DNA, which may be silent, negative, or positive, to the organism in which they occur?
答案：D
解題說明：
A mutation is a random change in the DNA sequence of an organism. Mutations can occur due to errors during DNA replication, exposure to radiation, or chemical agents. These changes may have no effect (silent mutations), cause harm (negative mutations), or provide an advantage (positive mutations). Recombination refers to the exchange of genetic material during meiosis, not random DNA changes. Duplication involves copying a segment of DNA, and replication is the normal process of copying DNA before cell division. The NEX Science exam often emphasizes that mutations are a source of genetic variation and can influence evolution and disease. Understanding the different possible effects of mutations is essential for topics related to genetics, cancer biology, and inheritance.
問題 #36
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P.S. Fast2test在Google Drive上分享了免費的2026 NLN NEX考試題庫：https://drive.google.com/open?id=10nPFWqDDKFSLHES98Q-KZ5jM0859d2hy