现今生活在地球上的爬行动物仍然能进化成为鸟类和哺乳类。 [ ]
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The work we are doing is quite difficult, so your support will certainly________.[ ]
A. make any difference
B. make a difference
C. be very different
D. be of some difference
肺动脉、支气管动脉、肺淋巴管、肺静脉、支气管静脉，属于肺功能性血管的是（）
A.肺动脉、支气管动脉
B.肺动脉、支气管动脉、支气管静脉
C.肺动脉、肺静脉
D.支气管动脉、支气管静脉
E.肺淋巴管、肺静脉、支气管静脉
