咖啡因兴奋中枢的主要部位是A．延髓 B．大脑皮质 C．脊髓 D．丘脑 E．延脑和大脑

---Do you think the micro-blog really_______ a platform_______ people to show their opinions?

---Yes, I think so.

A. offers; for         B. provides; for              C. provides; with

Lasegue征是（）

A.浅反射

B.深反射

C.病理反射

D.脑膜刺激征

E.神经根受刺激的表现

—Where ____ our volleyball? Do you know?

—I think it's ____ the bed. [ ]

A. is, in

B. are, under

C. is, under

如图，游标卡尺的读数是_______cm；，螺旋测微器的读数是_______mm

在几种托收方式中，对卖方而言风险最大的是（）

A．即期付款交单

B．远期付款交单

C．承兑交单

D．票汇