严重铅中毒，其临床表现不常有（） A.腹绞痛、肝病 B.中毒性心肌炎 C.溶血性贫血

某企业上年销售收入为1000万元，若预计下一年产品价格会提高5%，公司增量增长10%，所确定的外部融资占销售增长的百分比为25%，则相应外部应追加的资金为（）万元。

A．38.75

B．37.5

C．25

D．25.75

Microwave communication uses high-frequency (56) waves that travel in straightlines through the air. Because the waves cannot (57) with the curvature of the earth, they can be (58) only over short distance. Thus, microwave is a good (59) for sending data between buildings in a city or on a large college campus. For longer distances, the waves must be relayed by means of "dishes" or (60) .These can be installed on towers, high buildings, and mountain tops.

A．material

B．equipment

C．medium

D．channel

毒物排泄的主要途径是

A．唾液
B．母乳
C．胃肠道
D．肾脏
E．汗液

高速公路行车发生火灾时，要将机动车驶进服务区或停车场灭火。