第3题: [单项选择]( )中毒可产生严重神经系统症状,部分患者出现全身皮疹,可有呼吸道刺激症状。 A. 铬 B. 铍 C. 四乙基铅 D. 磷 参考答案:C 答案解析:铅中毒者口内有金属味、流涎、恶心、呕吐、腹胀、阵发性腹绞痛、便秘或腹泻,严重者出现抽搐、瘫痪、昏迷、循环衰竭、中毒性肝病、中毒性肾病、贫血、中毒性脑病等;四乙基铅中毒可产生严重神经系统症状,部分患者出
第11题: [单项选择]______, he does get irritated with her sometimes. A. As he likes her much B. Much though he likes her C. Though much he likes her D. Much as he likes her 参考答案:D 答案解析:[试题分析] as引导让步状语从句的用法。
[详细解答] 根据句意,空格处应为让步状语从句,因此A原因从句不符合。B和C的语序错误,正确语序应为“Though he likes her much”
第29题: [单项选择]Many tourists visit Muir woods rather than other redwood forests________. A. because it has no admission fee B. because it is near San Francisco C. because it has a good view of the coast D. because it can be seen in one hour 参考答案:B