关于预应力混凝土工程中的先张法，说法不正确的是（)。A．先张拉钢筋，后浇筑混凝土B．预应力筋的张拉

65 There are four general classes of products that the purchasing department seeks to obtain for production. Which is not one of these categories:

A. Raw materials

B. Standard production items

C. Special items

D. Items of small value

E. Semi-precious materials

147 There are four general classes of products that the purchasing department seeks to obtain for production. Which is not one of these categories:

A. Raw materials

B. Standard production items

C. Special items

D. Items of small value

E. Semi-precious materials

In general, the increasingly exaggerated claims of some beauty products by the advertisements are vacant promises.

Which director is giving the opening speech at th~ Annual General Meeting？

A．Sales

B．Personnel

C．Finance

A．ABC superfamily and P-class pumps

B．ABC superfamily and P-class pump

C．F-class pumps and P-class pumps

D．F-class pumps and V-class pumps

The supply and demand of agricultural products are ______ balanced.

A．on purpose

B．on average

C．in advance

D．in general

A.Compilation succeeds.

B.Exactly one class does NOT compile.

C.Exactly two classes do NOT compile.

D.Exactly four classes do NOT compile.

E.Exactly three classes do NOT compile.