对原发性巨球蛋白血症以下叙述正确的是()。
A.常有骨质损坏
B.起病后迅速恶化
C.由逆转录病毒感染所致
D.肝、脾肿大较常见
E.骨痛和贫血
参考答案:D
–The house ____ fire and was destroyed.
--Who ____ fire to the house?
A.set; caught
B.caught; set
C.took; played with
D.was; caught
非防爆的移动型电气仪表()在爆炸危险场所使用。
A.禁止
B.不宜
C.尽量少