我国民用航空业的管理部门为民用航空监督管理委员会。
参考答案：错
The fat boy always worries about _______ enough food _______ every day. How funny!
A．having not, eat
B．having not, to eat
C．not having, eat
D．not having, to eat
锚杆钻孔应圆而直，锚杆的钻孔直径应大于杆体直径（）
A.10mm
B.15mm
C.20mm
