关于对比剂硫酸钡,以下错误的是()
A.是难溶性固体对比剂
B.不被胃肠道吸收
C.以原形从粪便中排出
D.可进行静脉注射
E.其混悬剂可涂布于胃肠道粘膜上
参考答案:D
A working party has been set up to ______ the financial problem of the company.
A.look up
B.look into
C.look back
D.look through
()、()属于柔性风筒。