题目内容

下列关于磁感应强度方向的说法中正确的是()

A. 磁场中某点的磁感应强度的方向规定为小磁针静止时N极所指的方向
B. 磁场中某点的磁感应强度的方向与小磁针S极在此处的受力方向一致
C. 磁场中某点的磁感应强度的方向由运动电荷在此处的受力方向决定
D. 磁感应强度的方向由磁场本身决定,与是否在磁场中放入运动电荷无关

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On a map, an east-west street is called a street and a north-south street is called________.(在地图上,东西走向的街道叫street,而南北走向的街道叫_________。)

A. an avenue
B. a street
C. a road

In New York City, if you're going north, take the ________ subway. (在纽约,如果你要往北,那坐地铁时要坐________方向。)

A. Downtown
B. Northtown
C. Uptown

There are two kinds of trains in New York subway : express train and local train, the logo of local train shape is ________ shape.(纽约地铁分快线和慢线,慢线地铁的标志是________形状。)

A. circular
B. diamond
C. square

The entrance to the subway is usually located at the street corner, and the sign of the entrance is the capital English letter ________.(地铁的入口通常在街道的拐角处,地铁是以大写英文字母________为代表的。)

A. M
B. T
C. B

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