19世纪末，美德两国经济迅速发展的原因不包括：（）A.拥有统一而广阔的国内市场 B.

脊髓髓外硬膜下病变最常见的是（）。

A.蛛网膜囊肿

B.脊髓动脉瘤

C.神经鞘瘤

D.脊髓动静脉畸形

E.转移瘤

情景交际。

Kevin: So, Tina, what   1   did you do?

Tina: You won't believe it, but I met Jake Dean!

Kevin: Jack Dean, the famous actor?

    You really   2   him?

Tina: Yes! He is making   3   movie at the aquarium.

Kevin: Wow. Did you get his autograph?

Tina:   4  , I didn't. Laura did. But I took his photo.   5   it is.

Kevin: Wow.   6   there other actors there?

Tina: No. We   7   saw Jake. Look, here's Toby. He   8   a prize in the   9   Shop.

Kevin: Did you win that hat?

Tina: No, I didn't. I bought   10  .

马钱子日服剂量是（）。

A．0.3～0.9g

B．0.15～0.3g

C．0.03～0.06g

D．0.05～0.1g

E．0.1～0.3g

为了减小测量误差，被测导线应置于钳形电流表钳口内的（）位置。

A、中心

B、靠近钳口

C、靠近表头

D、任意

下列图标表示（）

A.铁塔

B.水泥杆

C.木杆