句子加工厂。（按要求写句子）

1．缩句。

（1）晚霞辉映的湖面上溅起了一圈圈彩色的涟漪。

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（2）四十件毛衣从我新开的时装店装上开往国外的货轮。

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2．把两句话合成一句话。

（1）老师告诉我们。我们要学习残疾运动员的拼搏精神。

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（2）我们迈着轻松的脚步。我们到大自然中找春天。

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3．用画线的词语造句。

（1）小家伙飞来飞去，一会儿落在柜顶上，一会儿神气十足地站在书架上。

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（2）只要大鸟在笼里生气地叫一声，它就立即飞回笼里去。

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SDLC was invented by IBM to replace the older Bisynchronous protocol for wide area connections between IBM equipment. A varietion of the (71) protocol called NRM is essentially the same as SDLC. SDLC is (72) protocol like HDLC, Frame Relay or X.25.An SDLC network is made up of (73) that controls all communications, and (74) . It is capable of (75) operation, but almost all practical applications are strictly half duplex.

A．half duplex

B．full duplex

C．half or full duplex

D．half and full duplex