A．stopB．startC．repairD．return
A. stop
B. start
C. repair
D. return
Thomas Edison is spoken of because______.
A. he also tried to invent a sewing machine
B. he got some of his ideas from dreams
C. he was one of Howe's best friends
D. he also had difficulty in falling asleep
The first paragraph is mainly about______.
A. the value of failure
B. how people fail
C. famous failures
D. how not to fail
包括组蛋白H1和166bpDNA的核小体结构称为染色质小体。
A. 正确
B. 错误
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