跑道纵坡是指：（）.A.跑道中线上最高点标高除以跑道长度 B.跑_爱下问搜题

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问题单项选择题

跑道纵坡是指：（）.

A.跑道中线上最高点标高除以跑道长度

B.跑道中线上最低点标高除以跑道长度

C.跑道中线上平均标高除以跑道长度

D.跑道中线上最高点标高与最低点标高之差除以跑道长度

答案

参考答案：D

补全对话，情景问答

选择正确的句子，将对话补充完整。

A. How can I get to the cinema? B. Thank you. C. take the No.12 bus.
D. Where is the bookstore? E. Is there a bookstore near here? F. Where is the cinema?

A: Excuse me.
B: Yes, there is a bookstore near here.
A:
B: The bookstore is next to the cinema.
A:
B: You can                      Walk straight for 5minutes.Then turn right. You can see the cinema on the right side. A:

单项选择题

目前常用标记白细胞的2种放射性药物是（）

A.¹¹¹In-oxine，^99mTc-HMPAO

B.¹¹¹In-DTPA，^99mTc-HMPAO

C.¹¹¹In-DTPA，^99mTc-ECD

D.^99mTc-MAG，¹¹¹In-DTPA

E.¹¹¹In-oxine，^99mTc-DTPA