皮皮学，免费搜题
登录
搜题
【简答题】
如图为某湖泊生态系统，湖泊中的剑水蚤以藻类植物为食，小虾以剑水蚤为食，小鱼能吃小虾．请分析回答下列问题： （1）该生态系统中能制造有机物的是______，属于生产者．剑水蚤、小鱼则属于______者． （2）在湖泊中还存在着许多腐生细菌和真菌，属于 ______者．它们能将动物粪便、动植物残体中的有机物分解，对生态系统的物质循环起着不可替代的作用． （3）该生态系统中的能量最终来源于______，能量在沿食物链传递过程中单向______． （4）一段时间后，湖泊中各种生物的数量又恢复原来状态，是因为生态系统具有一定的______能力．
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】The boss told his secretary to＿＿＿the documents for later use．
【单选题】The boss told his secretary to __________ the documents for later use．
A.
turn on
B.
put away
C.
make up
D.
break out
【简答题】收货人或其代理持_____ 在海关规定的期限内备妥报关资料,向海关申报。海关验放后在_____ 的规定栏目内盖放行章。
【单选题】In tanker trade，the signing by master the documents relating to the use of jetties and berths ______ the shipowners thereby to pay for any damage caused to the jetties or berths by the vessel's using ...
A.
ties
B.
binds
C.
does
D.
has
【判断题】进出口货物收经货人或其代理人应当自接到海关“现场交单”或者“放行交单”通知之日起 7 日内,持打印的纸质报关单,备齐规定的随附单证并签名盖章,到货物所在地海关提交单证并办理相关海关手续。
A.
正确
B.
错误
【单选题】We can use the word processor to (74) your documents.
A.
edit
B.
compute
C.
translate
D.
unload
【简答题】The boss told his secretary to ________the documents for later use. [A]turn on [B]put away [C]make up [D]break out
【单选题】Which of the following is correct with respect to the design and use of business documents?
A.
The documents should be in paper format.
B.
Documents should be designed for a single purpose to avoid confusion in their use.
C.
Documents should be designed to be understandable only by those who use them.
D.
Documents should be prenumbered consecutively to facilitate control over missing documents.
【简答题】调速回路有 、 和 三种形式。
相关题目：
【单选题】We can use the word processor to (74) your documents.
A.
edit
B.
compute
C.
translate
D.
unload
参考解析：
知识点：
题目纠错 0
发布
