正确答案: C

硫酸H2SO4

题目：下列物质的化学式的读法和写法都正确的是

解析：B

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举一反三的答案和解析：

[单选题]________________ is introducing Auld Lang Syne to us.

Buddy Thomas. D． The passage doesn’t tell us.

[单选题]Why was Mrs. Green surprised? __________ .

Because her husband was still at the airport at 5 o’clock

[单选题]When do you have history?—_______10:00．

At

解析：1．C  【解析】表示“在（几点钟）”要用at．

[单选题]7．—Are broccoli and carrots __________．—Yes，they are．

vegetables

解析：7.D【解析】vegetable是可数名词，复数形式是 vegetables．

[单选题]Water is the __46___ of all the things we eat and drink . Not many people understand this but __47____ quite true . The human body can go without ___48___ for a long time . We’ve got many examples for this . Yet two __49___ three days without water can usually make people __50____ . Man can’t live __51____ water .Many people don’t understand how ___52__ water the human body needs __53___ work well , and many people , especially young people , do not drink enough , ___54__ in very hot weather . Our body has mostly water , about 65% to 75% . That is to say about two thirds of our body is water . When we do sports , some of the water will get away from our body . __55 _ we don’t drink some water , we won’t have enough water． And if we don’t have enough water , we’ll feel tired and many of us will get ill . So you know how important water is to us .

most important

[单选题]43.

kept

[单选题]Communication is important because it can help people to ______.

understand the world and other people better around us.

[单选题]有一位篮球队队长在获得总冠军时说：“你以为这是一个人在战斗，那你就错了，这是五个人的运动。”材料说明

合作是事业成功的土壤