不属于机械密封冲洗的注意事项的是（）。A.检查循环水是否畅通 B.机械密封冲洗液管线

方程（x-1）²（x+2）（x-3）=0的解集中含有______个元素．

阅读下面的短文，根据上下文意义和所给单词首字母，写出空白处单词的正确形式。

    If you travel by (1)a             across the center of Africa or South America, you fly over forests for

thousands of kilometers. These great forests are the oceans of (2)t             . There are thousands and

thousands of kinds of plants and (3)a            .

    However, the world's forests are getting (4)s             all the time. In many places, we're cutting down

the trees because we need wood and we need more farmland. Some people say that (5)t              will not

be any forest like these in 30 years. What will happen if they (6)d             ?

    If we cut down our forests, a lot of plants and animals will disappear from the (7)w             . In a lot

of places the new farmland will soon look like the old desert. Crops will not grow there. It will not rain

very often, and the weather will get very hot. Perhaps the climate (气候) of the world will (8)c             .

This will be (9)d             for everyone in the world. That's (10)w              we must take care of our forests.

患者男，65岁，因“突发昏迷2h”来诊。患者2h前饮酒时突然语言不清，随即昏倒在地，呕吐1次，为胃内容物。同时排尿、排粪失禁，被家人急送入院。既往有高血压病史26年，无心脏病、糖尿病病史，无药物过敏史。饮酒31年，每日饮白酒200ml。查体：T36.9℃，P93次/min，R20次/min，BP210/120mmHg；中度昏迷，双眼向左凝视，瞳孔：L∶R＝4mm∶2mm，左侧对光反射弱，右侧对光反射灵敏；心、肺、腹无异常；右侧偏瘫，腱反射亢进，右侧肢体少动，右侧Babinski征（＋），右侧Chaddock征（＋）。

最可能的诊断是（）。

A.脑出血

B.脑梗死

C.短暂性脑缺血发作

D.高血压危象

E.急性左心衰竭

硫代硫酸钠作为抗氧剂用于（）。

A.弱酸性药液

B.乙醇溶液

C.碱性溶液

D.油溶性维生素类制剂

区域报警系统是一个报警区域设置（）区域火灾报警控制器。

A.一台

B.两台

C.三台

D.三台以上