【单选题】在天气晴朗的夏季,将用全素营养液培养的植株置于密闭的玻璃罩内放在室外进行培养,假定玻璃罩内植物的生理状态与自然环境中相同。每隔一段时间用CO 2 浓度检测仪测定玻璃罩内CO 2 浓度,绘制成下图所示曲线。据图得出的判断中错误的是()
B.
CO 2 浓度下降从D点开始,说明植物进行光合作用是从D点开始的
【简答题】Write English full name and Chinese translation 。 USB
【单选题】Definition of Laser s canning c onfocal m icroscopy
A.
It is based on the observation that two single-stranded nucleic acid molecules of complementary base sequence can form a double stranded hybrid.
B.
Technique whereby two different types of cells (from one organism or from different species) are joined to produce one cell with one, continuous plasma membrane .
C.
T he specimen is illuminated by a finely focused laser beam that rapidly scans across the specimen at a single depth, thus illuminating only a thin plane (or “optical section”) within the specimen .
D.
The smallest distance between two points on a specimen that can still be distinguished as two separate entities .
E.
They are made by identical immune cells from a unique parent cell .
【单选题】在数据管理技术的发展过程中,数据独立性最高的 阶 段是
【简答题】Write English full name and Chinese translation 。 RFID
【简答题】Write English full name and Chinese translation 。 CPU
【简答题】Write English full name and Chinese translation 。 API
【单选题】下列对地应力的叙述,表达不正确的是( )。
A.
地应力一般是指地壳岩体天然状态下所具有的内应力,或称为初始应力
B.
地应力是在构造运动作用下形成的应力,有时包括在岩体的物理变化、化学变化及岩浆侵入等作用下形成的应力
D.
地下洞室开挖,使岩(土)体中原来的应力平衡状态发生了变化,可能导致洞室围岩的变形破坏,因此地应力及地下洞室围岩应力的分布特征与地下洞室稳定关系很大
【简答题】Write English full name and Chinese translation 。 AI