【单选题】She is good ______ music.She can be good _____ children in the music club.
【简答题】套筒是常用的轴上零件的一种____定位方法;键是一种____定位方法。
【简答题】氢气是工业生产中非常重要的原料。 I.工业上大量的氢气来源于焦炭与水蒸气在高温下的反应:C(s)+H 2 O(g) H 2 (g) +CO(g)。 在一定温度下,向体积为2L的密闭容器中加入1 mol C和1 mol H 2 O,发生上述反应。 (1)一段时间后,下列物理量不再发生变化时,能表明该反应已达到平衡状态的有___(填序号)。 A.混合气体的密度 B.容器内气体的压强 C.混合气体的总物...
【单选题】He is not good at English, and neither ___ good at French.
【单选题】Believing that good will be _______with good and evil with evil, she did good deeds _____ she went. But to her disappointment, the result was quite the other way around. [ ]
【单选题】What does the woman mean?
A.
She is good at Chinese.
B.
She is not good at English.
C.
She is not good at Chinese.