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
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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
为了使肌细胞质膜去极化，肌质网(SR)中的Ca2+泵使用ATP水解释放的能量将Ca2+从SR的腔输往胞质溶胶，以启动肌收缩。
A. 正确
B. 错误
When Florence said "I'm more of a creature to polish my mind than polish my furniture" (Line 2, Para. 1) , she meant that______.
A. she was tired of learning
B. she was thirsty for knowledge
C. she was more suitable for doing housework
D. she didn't have enough time to keep the house clean
1949年中华人民共和国的成立，标志着中国进入()。
A. 旧民主主义向新民主主义的过渡时期
B. 新民主主义向社会主义的过渡时期
C. 新民主主义革命到建设的过渡时期
D. 社会主义革命到建设的过渡时期
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