盲板作业平台必须设置1m高的围栏，并设两层横杆，每层间隔（）mm。

阅读理解，判断正"T"误"F"。

Dear Tina,

   How are you? I learnt to send emails yesterday. Last weekend I went to a Chinese restaurant with Joy

and Peter. We ate traditional Chinese food there. I think it's delicious and I like it. Tonight I went to Tom's

birthday party. We all ate a big birthday cake and drank some juice. I gave Tom a present. He liked it very

much. How about your weekend?

    Yours,

    Mary

( ) 1. Mary can send an email now.

(     ) 2. Mary went to a park last weekend.

(     ) 3. Mary likes Chinese food.

(     ) 4. Tom had a birthday party tonight.

President Hu Jintao urged every effort ________ to rescue and treat the injured German tourists in a traffic accident in Tianjin on the morning of Oct1, 2012.

A．is made

B．must be made

C．be made

D．should make

长期接触苯可引起（）

A.滑囊炎

B.造血系统损害

C.神经系统的损害

D.呼吸系统损害

E.泌尿系统损害

发生急性HCV感染后，可能转为慢性HCV携带者或慢性丙型肝炎的比率是（）。

A.50％以下

B.20％

C.5％～10％

D.50％以上

E.30％

在测定基础代谢率的注意事项中，错误的是

A．于清晨、卧床、醒来之前进行

B．无精神紧张

C．无肌肉活动

D．测定前至少禁食12h