下面关于定滑轮和动滑轮说法不正确的是（）。 A.定滑轮省力，动滑轮改变方向 B.定滑

下列有关胎儿心音知识，正确的是（）

A.妊娠18～20周用听诊器经孕妇腹壁能听到胎儿心音

B.胎儿心音呈单音

C.胎心率与母体心率近似

D.胎心音速度较慢

E.多伴杂音

正常人血糖波动范围很窄，一般在多少以内（）

A.1.41～4.56mmol/L

B.2.82～7.88mmol/L

C.3.33～8.89mmol/L

D.4.33～9.76mmol/L

E.5.55～10.11mmol/L

中餐厅应合理布局，一般小桌应（）摆放。

A.靠边摆放

B.靠里的角落

C.摆放在餐厅中间

D.摆放成六角形

车辆滚动轴承滚子严重剥离，会引起车辆车轴（）。

A、热切

B、冷切

C、变形

D、裂纹

One of you close friends tells you : “ I am suffering from depression(沮丧、消沉). I have trouble sleeping. I’m often tired. When I think about the future I feel hopeless about it. I don’t enjoy anything. I am never happy. I don’t laugh or smile any more.” You would like to help him/ her to find one or more solutions.

Tell him or her what he/ she should do.  ________________________

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