Tom writes _____ of the three.
A. better
B. best
C. good
D. well
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The ice in the lake is about one meter _____. It’s strong enough to skate on.
A. long
B. high
C. thick
D. Wide
Jimmy is the second _____ boy in the class.
A. young
B. younger
C. youngest
D. the youngest
Tom is the _____ of the two.
A. tall
B. taller
C. tallest
D. the tallest
(易)若空间存在两根无限长直载流导线,空间的磁场分布就不具有简单的对称性,则该磁场分布( )。
A. 不能用安培环路定理来计算
B. 可以直接用安培环路定理求出
C. 只能用毕奥-萨伐尔定律求出
D. 可以用安培环路定理和磁感应强度的叠加原理求出