在两线间堆放道砟、片石、砂子等线桥用料，料堆的高度不得高于钢轨顶面（）。A、100m

M: What would you like for dessert I think I’ll have apple pie and ice cream.
W: The chocolate cake looks great, but I have to watch my weight. You go ahead and get yours.
Question: What would the woman most probably do

A. She’ll have some chocolate cake.
B. She’ll take a look at the menu.
C. She’ll go without dessert.

D. She’ll prepare the dinner.

级差式活塞刮油环设在（）。

A、低压级的活塞上部

B、低压级的活塞下部

C、高压级的活塞上部

D、高压级的活塞下部

慢性纤维空洞型肺结核的临床特点是（）

A.病程不超过2个月

B.空洞长期不愈，经常排菌

C.空洞仅出现在肺的一侧

D.X线检查不会有纤维化

E.多为单个薄壁空洞

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