种子用价
参考答案：
样品中真正可以利用的种子占样品种子质量的百分数，是净度和发芽率的综合指标。（=净度*发芽率*100%）选择净度高的种子，否则难以弥补。
从生理学角度出发，体温是指
A．口腔温度
B．直肠温度
C．腋窝温度
D．身体深部的平均温度
E．体表皮肤的平均温度
根据中文提示写出单词或词组，按适当形式填空。
小题1:The place has rapidly __________(发展) from a small village to a famous place of interest.
小题2:We couldn’t go home ___________(除非) we cleaned the classroom.
小题3:It’s ________( 可能的) that we gave him the wrong information.
小题4:The air was so cold that we could hardly ___________.(呼吸)
小题5:He had to ____________( 帮助养活) his family when he was a child.
