下列可以引起过敏性哮喘的毒物是（）
A.二异氰酸甲苯酯
B.丙烯腈
C.三硝基甲苯
D.锰
E.敌百虫
参考答案：A
To our great surprise, we got _____ people to attend the conference as we expected.
A．twice as many
B．twice many
C．twice many as
D．as twice many
早产儿易出现低体温的原因有（）。
A.生后水的入量少，血液浓缩
B.体温调节中枢发育不完善
C.体表面积相对较大
D.皮下脂肪薄
E.棕色脂肪多
