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【简答题】
Most of us probably live without vegetables,but a world without chocolate? Now that would be hard! According to chocolate makers it could happen if we don ’ t act soon. There are two main causes of the chocolate shortage --- chocolate ’ s growing popularity and less production of cocoa,the plant from which chocolate is made.With more and more people in India and China loving chocolate,not much can be done about the first cause. Therefore,the only thing we can do is to increase cocoa production.However,new plant diseases and little rain in Ivory Coast and Ghana,the world ’ s largest producers,have reduced cocoa production by 40 percent in the past 10 years.What ’ s worse,many cocoa farmers in Africa and other cocoa-producing countries like Indonesia and Venezuela are changing to easier-to-grow crops such as com or rubber.This way,the farmers can make more money. To prevent more farmers from changing,researchers at the newly opened International Cocoa Control Centre,in the UK,are trying to create new cocoa plants that are stronger and faster growing.But first they must make sure the new plants are safe to grow.This takes a long time. First,each new plant is stored at the Control Centre for six months to make sure it is healthy.It is then planted in the Centre ’ s fields,studied and tested for another two years.Only after scientists are certain that they ’ re disease-free,will the plants be sent to farmers in West Africa or wherever else they are needed. To create new stronger types of cocoa,scientists at the Centre are combining the best parts from different cocoa plants.Though the world is facing a serious chocolate shortage,there is now hope!
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【单选题】不具有侵袭力、不侵入肠上皮细胞的致病菌是是
A.
伤寒沙门菌
B.
霍乱弧菌
C.
小肠结肠炎耶尔森菌
D.
志贺痢疾杆菌
E.
鼠伤寒沙门菌
【简答题】事业单位后勤部门领用维修材料,账面余额为5000元。
【单选题】卡拉胶与( )有协同作用
A.
黄原胶
B.
果胶
C.
CMC
D.
槐豆胶
【判断题】在RLC串联交流电路中,UR、UL、UC的数值都有可能大于端电压。
A.
正确
B.
错误
【多选题】机器安全装置主要有()
A.
4
B.
防护装置
【多选题】机器安全装置主要有( )
A.
防护装置
B.
保险装置
C.
联锁装置
D.
信号装置
【简答题】事业单位后勤部门领用维修材料,账面余额为5000元
【单选题】现代研究表明,生姜能促进消化液分泌,保护胃粘膜,具有抗溃疡、保肝、利胆、抗炎、解热、抗菌、镇痛、镇吐作用。其醇提物能兴奋血管运动中枢、呼吸中枢、心脏。正常人咀嚼生姜,可()。生姜水浸液对伤寒杆菌、霍乱弧菌、阴道滴虫均有不同程度的抑杀作用。
A.
升高血压
B.
降低血压
C.
升高血糖
D.
降低血糖
E.
升高血脂
【单选题】以下分别说的是哪种增稠剂 1、凝胶质硬,用于食品加工可使制品具有明确形状,但组织粗糙,表皮易收缩起皱,质地发脆 2、与两价阳离子能在室温下形成凝胶, 其凝胶强度尚取决于溶液的浓度.Ca2+含量.PH和温度 3、能形成弹性凝胶且与刺槐豆胶.魔芋胶.黄原胶等胶体产生协同作用,提高凝胶的弹性和保水性。 4、能够形成富有弹性的凝胶,但在60左右的温度下容易融化
A.
海藻酸钠. 琼脂.明胶.卡拉胶
B.
海藻酸钠. 果胶.明胶.卡拉胶
C.
琼脂.海藻酸钠.卡拉胶.明胶
D.
果胶.海藻酸钠.明胶.卡拉胶
【判断题】在RLC串联电路中, 的数值都有可能大于总电压。
A.
正确
B.
错误
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