肾肿瘤CDFI特点（）。①无血流型②丰富血流型③星点状血流型④少血流型⑤抱球型
A.①
B.②③④⑤
C.②⑤
D.③④
参考答案：B
氢气作为一种新能源，普遍被人们重视并加以研究．请你谈一谈氢气作为燃料具有的优点和缺点．
（1）优点是：______；
（2）缺点是：______．
He ________the shop while the manager was away.[ ]
A. was left in charge of
B. left in charge of
C. was left in the charge of
D. left in the charge of
