单项选择题 极重度聋指的是( ) A．平均听阈26～40dB B．平均听阈41～55dB C．平均听阈56～70dB D．平均听阈71～90dB E．平均听阈91dB以上

单项选择题 ______ when he began to dream ______ far-away lands. A．Hardly did he fall asleep; for B．No sooner had he fallen asleep; for C．Hardly had he fallen asleep; of D．No sooner did he fall asleep; of

单项选择题 2岁的幼儿应具备的语言水平为( ) A．模仿母亲的声音 B．元音和辅音结婚的声音 C．能发同齿背音、爆破音 D．可以说两词句 E．可以讲三词句