肺部X线表现为锁骨下区纤维条索状阴影,应属于()
A.原发性肺结核
B.血行播散型肺结核
C.浸润性肺结核
D.结核性胸膜炎
E.慢性纤维空洞型肺结核
参考答案:C
They are putting too much carbon dioxide into the atmosphere, ______ prevents heat from escaping from the earth into space.
A.what
B.that
C.which
D.who