桥枕钻螺栓孔时,要求孔眼直径比螺栓杆不大于()。
A、1mm
B、2mm
C、3mm
D、4mm
参考答案:B
.
Only through ______ talks can we build trust and only through cooperation can we create _______ win-win economic situation.
A.\, a
B.the, the
C.\, the
D.the ,a
沙眼衣原体直接涂片检查一般采用何种染色方法( )
A.革兰染色B.姬姆萨染色C.银染D.抗酸染色E.亚甲蓝染色