有一箱苹果，拿了二个来尝一尝，是甜的，于是得出结论：这箱苹果是甜的。这是不完全归纳法。（ ）
参考答案：对
It ________ over ten years since the dog ____________.
A．is; died
B．is; has been dead
C．has been; has died
D．was; has died
流脑的主要临床特征是()
A．急起高热、头痛、呕吐、昏迷、脑膜刺激征
B．急起高热、头痛、呕吐、昏迷、呼吸衰竭
C．急起高热、惊厥、呼吸衰竭
D．缓慢起病，发热不明显、头痛剧烈，无休克
E．急起高热、头痛、呕吐、皮肤粘膜瘀点瘀斑、脑膜刺激
