问题
单项选择题
新蒸汽必须是饱和蒸汽，温度小于（）
A.160℃
B.165℃
C.170℃
D.155℃
答案
参考答案：A
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新蒸汽必须是饱和蒸汽，温度小于（）
A.160℃
B.165℃
C.170℃
D.155℃
参考答案：A
| 完形填空。 | |||
| Jimmy is very __1__ at Math. Mary, his sister, doesn't do well __2__ it. Jimmy often helps her with math. One night, Jimmy and Mary take out their exercise-books and begin __3__ their lessons. Soon Jim my finishes __4__ his homework, but his sister __5__ .  she cant' work __6__ the last problem. "Let me__7__ you," say Jimmy. "No, please __8__ . I'll do it myself," says Mary. She thinks and thinks, an hour later she __9__ it out. She is very tired, but very __10__ . | |||
| ( ) 1. A. good ( ) 2. A. at ( ) 3. A. to make ( ) 4. A. do ( ) 5. A. doesn't ( ) 6. A. on ( ) 7. A. to help ( ) 8. A. isn't ( ) 9. A. finds ( ) 10. A. sorry | B. better B. in B. do B. to do B. don't B. out B. to speak B. couldn't B. works B. bad | C. fine C. on C. to do C. did C. needn't C. at C. help C. can't C. looks C. happy | D. well D. of D. to get D. doing D. can't D. far D. to tell D. don't D. does D. angry |
