题目

在化学反应中，有时存在“一种物质过量，另一种物质仍不能完全反应”的特殊情况。下列反应中属于这种情况的是    ①过量铜与稀硝酸反应；           ②过量的稀盐酸与块状石灰石反应；    ③浓盐酸与过量的MnO2反应；      ④过量的铜与浓硫酸反应；    ⑤过量的H2与少量的N2在有催化剂、高温高压条件下反应。      A．③④⑤         B．②③⑤         C．①②④         D．①②③④⑤完形填空。It's spring now. It's ________. I often go hiking ________ my friends on the weekend. Now we ________ in the nature park. Linda, one of my ________, is looking at a ________. The monkey is ________ a tree. Wang Ben and I are ________ pingpong. At noon, we ________ a picnic here. Look! Some fish are ________ in the river. How ________!【1】A.warmB.coldC.hot【2】A.andB.butC.with【3】A.amB.areC.is【4】A.friendB.friendesC.friends【5】A.monkeysB.monkeyC.monkeies【6】A.climbingB.climbsC.climb【7】A.playB.playingC.plays【8】A.hasB.hadC.have【9】A.swimingB.swimmingC.swim【10】A.funnyB.funyC.fun