为了减少电击（触电）事故对人体的损伤，经常用到电流型漏电保护开关，其保护指标设置为≤30mAS。请从下列选项中选择其正确含义。（）
A.流经人体的电流（以毫安为单位）和时间（以秒为单位）的乘积小于30。例如电流为30mA则持续的时间必须小于1秒
B.流经人体的电流必须小于30毫安
C.流经人体电流的持续时间必须小于1秒
D.流经人体的电流必须小于30微安
参考答案：A
| 阅读理解。 | |
| The world is an interesting place. Different people like different things. Some people like loud music. Other people don't. 1._______ Many people like sports, but they do not all like the same sports. In some countries, cricket (板球运动) is a very popular sport. In others it is not popular at all. No one plays it or watches it on TV. However, most people like cocker. The World Cup is very popular. 2._______. Different people like different foods. Some people do not like meat. 3.______ Some people do not like potatoes or bread. They prefer rice. 4._______ Most people have their favorite colors. Some people like bright colors. Others prefer pale colors. Many people like traveling. Different people like different places. Some people like to go to the country. They like the fresh air. Some people like to go to the cities. Because they like shopping. 5._______ What do you like? Have you got an idea? | |
根据短文内容，从下面方框选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
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