问题
选择题
能证明分子在化学变化中可以再分的是 [ ]
A．小麦磨成粉
B．加热使水气化
C．加热氧化汞有氧气生成
D．在远处能闻到花的香味
答案
答案：C
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能证明分子在化学变化中可以再分的是 [ ]
A．小麦磨成粉
B．加热使水气化
C．加热氧化汞有氧气生成
D．在远处能闻到花的香味
答案：C
| 完形填空。 | |||
| It was a Monday morning. When a teacher walked into the_______(1), he heard a low voice: “Here is the teacher. I am_______(2) this boring fellow(烦人的家伙) is going to talk about putting in commas(逗号).” It was_______(3) voice. His name was Bill. He was talking________(4) the boy next to him. The teacher didn’t get angry. He said________(5) about it , then he really began to talk about putting in commas, and then he wrote________(6) the sentence: “Bill says the teacher is a boring fellow.” The class_______(7) and Bill’s face_______(8) red. “Now,” said the teacher, “I’ll_______(9) you how important commas are.” He put two commas in the sentence, and now read, “ ______(10) is a boring fellow.” | |||
| ( ) 1. A. library ( ) 2. A. sorry ( ) 3. A. his ( ) 4. A. with ( ) 5. A. much ( ) 6. A. on his desk ( ) 7. A. laughed ( ) 8. A. got ( ) 9. A. answer ( ) 10A The teachersaysBill, | B. school B. sure B. the teacher's B. of B. everything B. on the blackboad B. stopped B. changed B. show B. Bill，saysthe teacher | C. classroom C. glad C. a boy's C. about C. something C. in his book C. looked C. turned C. ask C. The teacher，saysBill | D. office D. surprised D. a girl's D. at D. nothing D. in Bill's exercise bok D. read D. grew D. give D. Bill, says the teacher |