在飞机维修中如果需要更换螺栓紧固件，为了确定螺栓以及与之配套

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问题单项选择题

在飞机维修中如果需要更换螺栓紧固件，为了确定螺栓以及与之配套使用的螺母和垫圈的种类和型号，应首先查阅：（）.

A.飞机制造商提供的机型零件目录

B.飞机制造商提供的适航指令

C.紧固件国家标准手册

D.紧固件行业标准手册

答案

参考答案：A

阅读理解

阅读理解。

1. From the poster (海报), Who can go to the youth club? [ ]

A. An 8-year-old boy

B. An 18-year-old boy

C. An 18-year-old girl

D. A 16-year-old girl

2. If you go there every weekend, how much will it cost you a month?[ ]

A. ￡2.50

B. ￡5.00

C. ￡10.00

D. ￡20.00

3. Where can you find this poster? [ ]

A. In a history book.

B. In a math book.

C. On the Internet.

D. In a science book.

4. When can you go to the club? [ ]

A. Sunday.

B. Tuesday.

C. Monday.

D. Friday.

5. We else can call the number ______ and join the club [ ]

A. 49638527

B. 49638257

C. 49368257

D. 49638657

单项选择题 A1/A2型题

下列哪项不是A族链球菌的致病因素（）。

A.链激酶

B.凝固酶

C.透明质酸酶

D.溶血毒素

E.M蛋白