Is that ____? [ ] A. some pens B. milk C

题型:选择题

问题:

Is that ____? [ ]

A. some pens

B. milk

C. apple

考点:不可数名词
题型:选择题

下列选项中不属于行政复议范围的是()。

A.劳动者与用人单位之间发生的劳动人事争议

B.对人力资源社会保障部门作出的行政处理决定有异议

C.申请工伤认定的职工或者近亲属、该职工所在单位对工伤认定有异议

D.对劳动人事争议仲裁委员会的仲裁、调解等行为有异议

E.对人力资源社会保障部门作出的行政处分或者其他人事处理决定有异议

题型:选择题

在实验室培养微生物,一方面需要为培养的微生物提供合适的营养和环境条件,另一方面需要确保无处不在的其他微生物无法混入。根据以上原则回答下列问题。

(1)牛肉膏蛋白胨培养基适于培养细菌、麦芽汁琼脂培养基适于培养酵母菌、马铃薯琼脂培养基适于培养真菌等,那么培养基配制的原则是__________,培养乳酸菌适合用_________培养基。

(2)焚烧酵母菌得到灰分物质是P2O5、K2O、SO3、MgO、CaO、Fe2O3、SiO2等,灰分物质可以作为配制此微生物培养基的__________营养成分。为了获得耐高糖和耐酸特性的酵母菌,需在基础培养基中___________。

(3)培养基配制时,灭菌与调pH的先后顺序是_______________。

(4)MS培养基用于植物组织培养,它与上述培养基的不同点是,现有一种珍稀菊花,可按如上图程序进行组织培养,请填写空白处。

(5)由于病毒不能在普通培养基上生长,因此培养这类微生物需要用___________作培养基,腐乳制作中_____________相当于培养毛霉等微生物的培养基。

(6)获得纯净菌种的常用方法是________和__________,统计菌落数目一般遵循2个原则,为了保证结果准确应_____________,为了提高实验结果的可信度应____________。

(7)在实验室培养微生物时,一旦发现培养物被污染,特别是真菌污染,应__________后再倒掉。

题型:选择题

Stepping into a pool of water is common enough, but who could ever imagine stepping into a pool of fish? In February of 1974, Bill Tapp, an Australian farmer, saw a rain of fish that covered his farm. How surprised he must have been when he heard many fish hitting against his roof!

   What caused this strange occurrence? This is a question that had long puzzled people who study fish. The answer turned out to be a combination of wind and storm.

  When it is spring in the northern part of the world, it is fall in Australia. Throughout the autumn season, terrible storms arise and rains flood the land. The strong winds sweep over Australia like huge vacuum cleaners, collecting seaweed, pieces of wood, and even schools of fish. Strong winds may carry these bits of nature for many miles before dropping them on fields, houses, and astonished people.

  Although they seem unusual, fish-falls occur quite frequently in Australia. When Bill Tapp was asked to describe the scene of fish, he remarked, “They look like millions of dead birds falling down.” His statement is not surprising. The wonders of the natural world are as common as rain. Nature, with its infinite wonders, can create waterfalls that flow upward and fish that fall out of the sky.

  56. What is this passage about?

  A. A sad story.             B. A rain of fish.

  C. Australia’s northern part.     D. The damage done by floods.

  57. Fish-falls occur in Australia_________ .

  A. quite often       B. on large farms

  C. only in winter     D. when the air is calm

  58. It is a known fact that ________.

  A. one should watch where one steps

  B. Bill Tapp is a scientist who studies farming

  C. the natural world can never create waterfalls that fall upward

  D. the seasons in the southern part are different from those in the northern part

 59. The word “infinite” is closest in meaning to _________.

  A. easy    B. difficult    C. countless    D. dangerous

题型:选择题
某单色光照射某金属时不能产生光电效应,则下列措施中可能使该金属产生光电效应的是(   )

A.延长光照时间

B.增大光的强度

C.换用波长较短的光照射

D.换用频率较低的光照射

题型:选择题

个人外汇储蓄账户资金境内划转,按以下规定办理().

A、本人账户间的资金划转,凭有效身份证件办理

B、个人与其直系亲属账户间的资金划转,凭双方有效身份证件、直系亲属关系证明办理

C、境内个人和境外个人账户间的资金划转按跨境交易进行管理

D、境内个人和境外个人账户间的资金划转按境内交易进行管理

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