问题
选择题
下列对一些事实解释不正确的是（ ）
A．用清洗剂除去油污，是因为洗涤剂能将油污溶解形成溶液
B．把铅加入锡中制成合金焊锡，主要目的是降低熔点
C．墙内开花墙外香，是因为分子在不断运动的
D．盐酸、硫酸都能使石蕊溶液变红，是因为溶液中都含有氢离子
答案
答案：A
搜题请搜索小程序“爱下问搜题”
下列对一些事实解释不正确的是（ ）
A．用清洗剂除去油污，是因为洗涤剂能将油污溶解形成溶液
B．把铅加入锡中制成合金焊锡，主要目的是降低熔点
C．墙内开花墙外香，是因为分子在不断运动的
D．盐酸、硫酸都能使石蕊溶液变红，是因为溶液中都含有氢离子
答案：A
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| As we all know, weather changes are different from other world problems. 1 It goes wherever it wants to go. Floods, strong winds, droughts, earthquakes, and things like that show us what a change in climate could bring upon us. 2 They may hurt people who live where they happen. If all countries work together to learn about the danger of nature, we can make it less dangerous and less expensive by helping each other. Luckily, in 1873, the MIO( 国际气象组织) was founded. 3 Our country joined it in 1972. World Meteorological Day (世界气象日) is celebrated each year on March 23rd. 4 Because it can change the weather. All of the countries around the world are trying their best to protect the environment. 5 People know that if we don't protect our environment or pay any attention to the changes in the weather and climate, bad things will happen.
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