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问题 单项选择题

用2.5MHZ.Φ20mm直探头探伤，试求200mm处Φ5平底孔与30mm•处Φ2平底孔的分贝差（）。

A.15dB

B.20dB

C.23dB

D.26Db

答案

参考答案：C

阅读理解

阅读理解。

Beijing Restaurant

MENU

SOUPS

Tofu soup￥10. 00   Bone soup￥15. 00   Chicken soup￥20. 00

STAPLES

Fried rice￥8. 00   Fried noodles￥10. 00   Hot dog￥4. 00

Meat pie￥10. 00   Sandwich￥10. 00   Hamburger￥10. 00

MAIN COURSES

Roast chicken￥30. 00   Italian pizza￥9. 00   Indian curries￥15. 00

Pork and cabbage￥15. 00   Cheese pie￥10. 00   Beef￥15. 00

Beijing Roast Duck￥50. 00   Sausage￥15. 00

DESSERTS

Fruit salad￥8. 00   Pear pancake￥6. 00   Apple pie￥6. 00   Ice cream￥4. 00

DRINKS

Coke￥5. 00   Coffee￥5. 00   Tea￥3. 00   Apple juice￥3. 00

Beer￥10. 00   Wine￥30. 00   Milk￥3. 00   Lemonade￥4. 00

1. Which soup can't you have in this restaurant? [ ]

A. Tofu soup.

B. Vegetable soup.

C. Bone soup.

D. Chicken soup.

2. How many kinds of main courses are there in this restaurant? [ ]

A. 7.

B. 8.

C. 9.

D. 10.

3. What's the price of pear pancake and a cup of tea? [ ]

A.￥8. 00.

B.￥9. 00.

C.￥7. 00.

D.￥6. 00.

4. If you have twelve yuan, what can you buy in this restaurant? [ ]

A. Four ice creams.

B. A bottle of wine.

C. An apple pie and a pear pancake.

D. A sandwich and a hot dog.

5. Here is Mr. Wang's bill. How much does he need to pay?

    BEIJING RESTAURANT BILL 

    Beijing Roast Duck

    Chicken soup

    Two bottles of beer

    Tea

     Fried rice 

    TOTAL:￥____ 

    Thank you for coming! [ ]

A. 91

B. 92

C. 93

D. 101

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判断题

夏季高温下拌合混凝土时，应采用冷水拌合。
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