高尔基体碎片，在含有ATP的溶液中温育时，能形成哪种衣被小泡？()
A. COPI
B. COPⅡ
C. clathrin
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What does the word "physical" in the first line mean in this passage？
A. Material.
Bodily.
C. Of physics.
D. Facial.
中间纤维是由32条肽链构成的具有极性的结构。
A. 正确
B. 错误
The passage is written for all the purposes EXCEPT ______.
A. introducing music from all over the world
B. advertising Osaka Yusen Broadcasting
C. suggesting listening to Osaka Yusen Broadcasting
D. introducing a variety of radio channels
The author had trouble operating his VCR because______.
A. he had neglected the importance of using the timer
B. the machine had far more technical features than necessary
C. he had set about using it without proper training
D. its operation was far more difficult than the designer intended it to be
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