引起苛性脆化的原因中与锅水水质有关的因素有（）。A、水中溶解固形物指标严重 B、氯根

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.

女性，30岁，因右肾结石行ESWL治疗3天后排出结石，两周复查右肾结石已排净，结石成分分析为磷酸盐结石，预防磷酸盐结石方法是（）。

A.口服维生素B或氧化镁

B.口服别嘌呤醇

C.碱化尿液，服卡托普利

D.碱化尿液，少食动物内脏

E.控制感染，服氢氧化铝凝胶

除锈后应立即（）。

A.冲洗

B.涂面漆

C.涂底漆

D.用油覆盖

某公司中老年、青年职员比例图表

该公司在1990年中老年职员所占的比重为（）

A．0.68

B．0.52

C．0.48

D．0.54

刃磨刮刀顶端时，它和刀头平面形成刮刀的立式车床主要用于（）的大小一般应按粗、细和精刮的不同要求而定。

A、后角

B、顶角

C、楔角

D、斜角