说明运动性中枢疲劳时神经递质的变化。

y science books in foreign languages.

A. Except

B. Except for

C. In reference to

D. In addition to

(A large collection of) contemporary photographs, (including) some taken by Mary (are) on display (at) the museum.

A．A large collection of

B．including

C．are

D．at

(A large collection) of contemporary photographs, (including) some taken by Mary (are) on display (at) the museum.

A．A large collection

B．including

C．are

D．at

(A large collection) of contemporary photographs, (including) some taken by Mary (are) on display (at) the museum.

A．A large collection

B．including

C．are

D．at

Our department has a large collection of books,______are in English.

A．many of which

B．many of them

C．many ones

D．their many

Our department has a large collection of books,______are in English.

A．many of which

B．many of them

C．many ones

D．their many

Our department has a large collection of books,______are in English.

A．many of which

B．many of them

C．many ones

D．their many

through two collection devices in series. The collection efficiencies are shown in the following table. What overall weight fraction of the particles is collected？

	First collection device	Second collection Device
Collection efficiency for small particles Collection efficiency for large particles	0.50 0.75	0.25 0.40

Our department has a large collection of books, ______ are in English.

A．many of which

B．many of them

C．many ones

D．their many

The foreign languages school has a large collection of books, ______ are in English.

A．many of them

B．many ones

C．many of which

D．many books