（3分）在寒冷干燥的冬季，降雪不仅净化了空气，减少了发病率，又能减缓旱情，给广大农民朋友带来福音．然而降雪又给外出的人们带来了诸多的不便，既影响了正常的交通运输，又使交通运输的安全成为隐患．今年年初的大雪给全国大部分地区特别是南方地区带来了前所未有的灾难．融雪剂不但具有融雪功能，还具有解冻、防冻等功能，你所学过的物质中______（填写化学式）和氯化钙是常见融雪剂的主要成分，这种融雪剂虽然便于融雪、除雪，价格也便宜，但这样融化后的雪或冰变成液体，也会产生极大的危害，请你列举出两条：

（1）______；

（2）______．

A recent poll indicated that half the teenagers in the United States believe that communication between them and their parents is (1) and further that one of the prime causes of this gap is (2) listening behavior. As a(an) (3) in point, one parent believed that her daughter had a severe (4) problem. She was so (5) that she took her to an audiologist to have her ear tested. The audiologist carefully tested both ears and reported back to the parent:"There’s nothing wrong with her hearing. She’s just (6) you out. "

A leading cause of the (7) divorce rate (more than half of all marriages end in divorce) is the failure of husbands and wives to (8) effectively. They don’t listen to each other. Neither person (9) to the actual message sent by the other.

In (10) fashion, political scientists report that a growing number of people believe that their elected and (11) officials are out of (12) with the constituents they are supposedly (13) Why Because they don’t believe that they listen to them. In fact, it seems that sometimes our politicians don’t even listen to themselves. The following is a true story: At a national (14) conference held in Albuquerque some years ago, then Senator Joseph Montoya was (15) a copy of a press release by a press aide shortly before he got up before the audience to (16) a speech. When he rose to speak, (17) the horror of the press aide and the (18) of his audience, Montoya began reading the press release, not his speech. He began, "For immediate release. Senator Joseph M. Montoya, Democrat of New Mexico, last night told the National... " Montoya read the entire six page release, (19) with the statement that he "was repeatedly (20) by applause.

2（）

A.malignant

B.deficient

C.ineffective

D.feeble