()不是热轧低碳钢焊接热影响区的组成部分。
A．过热区
B．正火区
C．部分相变区
D．再结晶区
参考答案：D
Though he came out ___________ in the 100-meter dash, he was made __________ second
best player in the sports meet held on ___________.
A．the first; a; April 22nd
B．first; the; May 31th
C．first; the; May 31st
D．the first; /; April 23rd
______ have been made for nearly three decades to increase the amount of precipitation from clouds by seeding them with salt or silver iodide.
A．Devices
B．Hypotheses
C．Attempts
D．Commissions
