乙型脑炎：（）
A.脑膜刺激征
B.脾脏肿大，明显贫血
C.两者均有
D.两者均无
参考答案：A
How can they learn much ________ they spend so much time playing computer games?
A．although
B．when
C．till
D．until
碗扣式钢管脚手架立杆纵距分为（）：
A.1.2m
B.1.5m
C.1.8m
D.2.4m
