加间苯三酚试液与盐酸，植物细胞壁显红色，表明该细胞壁（）A．_爱下问搜题

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问题单项选择题

加间苯三酚试液与盐酸，植物细胞壁显红色，表明该细胞壁（）

A．木质化

B．木栓化

C．角质化

D．硅质化

E．黏液化

答案

参考答案：A

填空题

选择方框内所给单词完成短文。

leaves, buy, thank, has, late, driver, school, cheap, something,
early, closed, friendly, floor, help, sell, dear, worry, evening

     Lin Hong is my new friend. Her father _____ (1) a shop near the factory. The things in his shop are
all _____ (2). And his family are _____ (3) to the workers. So they like to buy _____ (4) there.
     It's Saturday today. Lin Hong doesn't go to _____ (5). She knows her father is busy and gets up
_____ (6). She finishes her homework and then goes to the shop to _____ (7) her father. There're many
people in it and she begins to _____ (8) pears, apples, oranges and drinks to the workers.
     A car stops near the shop. The _____ (9) comes in and buys some cakes and then _____ (10). Lin
Hong finds his bag on the _____ (11). She runs with it, but she can't see his car.
     "Don't _____ (12)," says Mr. Lin. "I know Mr. Yang. We can take it to him this _____ (13)."
     It's nine and the shop is _____ (14). Lin Hong is tired. Lin Hong and her father go to Mr. Yang's.
The man and his family _____ (15) them very much.

单项选择题

(一)

某企业集团既经营生产资料也经营生活资料，经营的商品主要有轴承、轮胎、橡胶、汽车、大米、食醋、食盐、疏菜、调味品等。该企业集团依据商品的供求形态来选择预测方法-并对企业经营的商品进行预测。另附该企业某年1—11．月汽车销售统计表(如下)：

时间(月)	1月	2月	3月	4月	5月	6月	7月	8月	9月	10月	11月	12月
销售量(辆)	470	560	580	580	560	550	600	610	620	630	640

根据以上资料，回答下列问题：

该企业正在尝试经营一种新产品，可选择的预测方法是( )。

A．一元线性回归分析法

B．移动平均数法

C．德尔菲法

D．算术平均数法