工业上用CO生产燃料甲醇.一定条件下发生反应:CO(g)+2H2(g)⇌CH3OH(g). (1)图1是表示一定温度下,在体积为2L的密闭容器中加入4mol H2和一定量
战国初期,分晋的三家除了魏外,另外两家是 A.韩、赵 B.齐、楚 C.赵、秦
女性生殖系统中,能产生卵细胞和雌性激素,激发并维持女性第二性特征是 ( ) A.输卵管 B.卵巢 C.子宫 D.阴道
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– Which of these two English books will you borrow? – I’ll borrow of them. Because they are very interesting. A.eitherB.allC.neitherD.both
He is a strict but kind teacher, _____ is always trying to make his classes lively and interesting. A. one B. he C. one who D. he who
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She’s in a hopeless situation, ________ we will keep a very close eye on. A.where B.when C.which D.that