变间隙式电容传感器的两极板之间的距离增加时,其电容值 。
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在中性环境中,细菌所带电荷特点是
A. 正电荷
B. 负电荷
C. 正负电荷数相等
D. 革兰阳性菌带负电荷
E. 革兰阴性菌带负电荷
去除热原质最好的方法是
A. 蒸馏法
B. 高压蒸汽灭菌法
C. 滤过法
D. 巴氏消毒法
E. 干燥法
If you ____this problem, you can turn to your teacher for help.
A. are confused
B. are confusing
C. were confused
D. were confusing
In this sentence the preposition “with” can be omitted.
A. 对
B. 错