钛和钛合金被认为是21世纪的重要金属材料．钛合金和人体有很好的

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问题选择题

钛和钛合金被认为是21世纪的重要金属材料．钛合金和人体有很好的“相容性”，利用钛合金这一特性可以（　　）

A．制造船舶

B．制保险丝

C．制人造骨

D．制造飞机

答案

钛合金与人体具有很好的“相容性”，制出的人造骨可以和人体进行很好的包容，可以用来制造人造骨，故选C．

阅读理解

阅读下列短文，根据短文内容选择最佳答案。

Daniel is a middle school student. He is very busy at his new school. Here is his school life table. Read

it carefully and answer some questions.

1. Daniel goes to school _____ at 7:30 a.m.

A. on foot

B. by bus

C. by car

D. by bike

2. When does he do morning exercises?

A. At 7:30 a.m.

B. At 6:00 a.m.

C. At 8:40 a.m.

D. At 8:00 a.m.

3. What does he do at 1:30p.m.?

A. He has lunch.

B. He chats with his classmates.

C. He has lessons.

D. He sleeps in class.

4. —How does Daniel go home?

—He goes home _____.

A. on foot

B. by bus

C. with his parents

D. with his classmates

5. —Who does he watch TV with?

—He watches TV with _____.

A. his friends

B. his father

C. his cousin.

D. his mother

多项选择题

PVA装置电缆的敷设方式有（）等。

A、直埋敷设

B、电缆沟敷设

C、电缆托架

D、电缆排管