皮皮学，免费搜题
登录
搜题
【单选题】
在果树的“坐果”时期，果农常常给果树的茎做半环状剥皮，这样可以增加坐，即俗话所说的“梨树砍三刀，树枝压弯腰”。其道理是A.
限制了有机物向根部运输
B.
限制了水分向茎叶运输
C.
限制了有机物和无机物向根部运输
D.
防止了害虫的侵害
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Which statement about “stream of consciousness” as a literary term is NOT TRUE?
A.
It is a mode of narration with smooth flow of language as well as thoughts.
B.
It is a mode of narration in which perceptions mingle with conscious and half-conscious thoughts, memories and feelings.
C.
It is a mode of narration that is often discontinuous and random, reflecting the confused individual and the chaotic world.
D.
It is a mode of narration that reproduces the continuous flow of a character’s mental process.
【单选题】托比•塔尔卡洛特(Toby Talkalot)订购了一项本地电话服务,该服务每月收取10美元的固定费用,并允许他拨打尽可能多的本地电话,而无需进一步付费。假设商品1是本地电话使用以外的商品集合,假设商品2是本地电话使用。(商品1在水平轴和商品2在垂直轴)。星期一,托比根本没有用电话。由此我们可以得出,他周一选择的消费束的无差异曲线的斜率m为:
A.
正。
B.
小于或等于0。
C.
0。
D.
大于或等于0。
【单选题】White rice is the world ’ s most popular form of rice. But it goes through a milling process that removes many nutrients（营养成分） . As a result, people who eat a poor diet based on white rice may not get...
B.
Because they feed on white rice
C.
Because white rice contains no vitamin
D.
Because white rice has no nutrients
【单选题】The main purpose of port State control is not to___________.
A.
prevent an unsafe ship proceeding to sea
B.
prevent a ship threatening the marine environment
C.
fine the ships
D.
confirm a safe sailing
相关题目：