某市生产柑桔,柑桔生长的主要环境条件是:年平均气温要求15℃以上,1月平均气温5

题型:探究题

问题:

某市生产柑桔,柑桔生长的主要环境条件是:年平均气温要求15℃以上,1月平均气温5℃以上;适宜种植在朝南或东南的向阳处;有水源可灌。请分析上述资料回答下列问题。(3分)

(1)影响柑桔生长的非生物因素主要有                  (至少答出两个);(每空1分)

(2)某科技人员想探究海拔高度对柑桔生长的影响,设计了如下的试验方案,并对实验结果进行了统计:

 条件产量个体大小甜度分析
A.组种植在海拔高度为150米的朝南坡地不甜,酸味重
B.组种植在海拔高度为300米的朝南坡地最高最大
C.组种植在海拔高度为450米的朝南坡地甜,略带酸
则本次实验中的变量为                  。(2分)

考点:探究实验:鸟适于飞行的特点动物的形态结构和功能
题型:探究题

在振子阵中,振子之间的距离(),在它们之间存在相互耦合的现象,称为耦合振子。

A、较大

B、较小

C、相等

D、都可以

题型:探究题

一部手机的原价为a元,降价4%后的价格为(    )元。

题型:探究题

突发事件具有突然.影响面广.危害大.可预知等特性。()

题型:探究题

循环链表的主要优点是______。

A.不再需要头指针了

B.从表中任一结点出发都能访问到整个链表

C.在进行插入、删除运算时,能更好地保证链表不断开

D.已知某个结点的位置后,能够容易地找到它的直接前件

题型:探究题

People are indulging in an illusion whenever they find themselves explaining at a cocktail (鸡尾酒) party, say, that the are "in computers", or " in telecommunications", or "in electronic funds transfer". The implication is that they are part of the high-tech world. Just between us, they usually aren’t. The researchers who made fundamental breakthroughs in those areas are in a high-tech business. The rest of us are (121) of their work. We use computers and other new technology components to develop our products or to organize our affairs. Because we go about this work in teams and projects and other tightly knit working group (紧密联系在一起的工作小组), we are mostly in the human communication business. Our successes stem from good human interactions by all participants in the effort, and our failures stem from poor human interactions.
The main reason we tend to focus on the (122) rather than the human side of work is not because it’s more (123) , but because it’s easier to do. Getting the new disk drive installed is positively trivial compared to figurine out why Horace is in a blue funk (恐惧) or why Susan is dissatisfied with the company aver only a few months. Human interactions are complicated and never very crisp (干脆的,干净利落的) and clean in their effects, but they matter more than any other aspect of the work.
If you find yourself concentrating on the (124) rather than the (125) . you’re like the vaudeville character (杂耍人物) who loses his Keys on a dark street and looks for them on the adjacent street because, as he explains, "The light is better there!\

A.technical

B.classical

C.social

D.societal

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