阅读理解。

     This is the twins' bedroom. It is a nice room. The two beds look the same. This bed is Lily's and that one

is Lucy's. The twins have two chairs and one desk. Their clock, books and pencil cases are on the desk.

Their backpacks are behind the chairs. Some nice flowers (花) are on the desk. Some pictures are on the wall.

Is there a baseball? Yes, it's under Lily's bed. The bedroom is very nice.

1. The twins are ______.

A. at home

B. have a nice room

C. in different room

D. in the same room

2. We can see ______ in the room.

A. one bed

B. two beds

C. Lucy's bed

D. Lily's bed

3. The clock is ______.

A. behind the door

B. behind the chair

C. on the desk

D. on the wall

4. Some ______ are on the desk.

A. pictures

B. flowers

C. chairs

D. clocks

5. We can find ______ under Lily's bed.

A. a backpack

B. some flowers

C. a basketball

D. a baseball

血细胞从原始到成熟，下列哪项符合血细胞发育的一般规律

A．细胞由小到大
B．核质比从小到大
C．核染色质结构由细致到粗糙
D．核仁从无到有
E．胞质颗粒从有到无