质子治疗具有高线性能量传递（LET）射线的特点包括（）。 A.生

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问题单项选择题

质子治疗具有高线性能量传递（LET）射线的特点包括（）。

A.生物及化学特点

B.生物特点而无剂量分布特点

C.生物及物理特点

D.剂量分布特点而无生物学优势

E.化学特点

答案

参考答案：D

阅读理解

阅读理解。根据短文内容选择正确答案。

Zhang Peng is going to visit his grandparents. He gets there by subway. Their home is next to the Science

Bookstore. He turns left at the subway station, then goes straight. Their home is on the left. Tom is going to the

Science Bookstore this afternoon. He wants to buy a new book. They are going after lunch.

1. _____________ is going to visit his grandparents.[ ]

A. Zhang Peng

B. Tom

C. Mike

2. He goes there _____________.[ ]

A. on foot

B. by bike

C. by subway

3. Their home is next to the _____________.[ ]

A. cinema

B. Science Bookstore

C. zoo

4. Their home is on the _____________.[ ]

A. left

B. right

C. east

5. They are going after _____________.[ ]

A. breakfast

B. lunch

C. dinner

单项选择题

一国出现持续性的顺差，则可能会导致或加剧( )。

A．通货膨胀

B．国内资金紧张

C．经济危机

D．货币对外贬值