重症肌无力（）
A.血清钾降低
B.眼外肌麻痹为首发症状
C.血清肌酸激酶异常增高
D.蓬毛样红纤维
E.皮肤牛奶咖啡斑
参考答案：B
The world economy has improved ________ since the end of last year，but major problems and challenges are not fully solved.
A．somehow
B．somewhat
C．anyhow
D．meanwhile
股票分割由于不能给投资者带来现实的利益，所以通常会刺激股价下滑。 ( )
