A: Sediment accumulates in a hole in the ice
B: Sediment is carried on top of the glacier
C: Sediment collects in subglacial stream channels
D: Sediment covers a stagnant block of ice
举一反三
- Which of the following statement is the appropriate description of cast? A: the hardened resin of tree sap trapped organisms within it, sealing them from the atmosphere B: a mineral-matter filling of a hollow space left by a dissolved shell C: a shell is buried in sediment and then dissolved, leaving the sediment to take the shape of the organism D: a filling of a life form’s pore spaces and cavities with precipitated minerals
- The "white chalk cliffs of Dover" are mentioned in line 14 of the passage to（） A: show where the plankton sediment first began to build up B: provide an example of a plankton buildup that scientists cannot explain C: provide all example of the buildup of plankton sediment D: indicate the largest single plankton buildup on Earth
- Due to the high sediment concentration and the broken geological structure of Jinghe riverbed, Zhengguoqu Canal was much silted and became out of use in _______ Dynasty.
- Which of the following best describes the formation of “desert pavement”? A: alluvial fans are eroded to form inselbergs with flat, angular rocky surfaces B: runoff and deflation carry off the fine particles of silt and clay, leaving coarser particles behind C: groundwater in an alluvial fan evaporates, leaving behind a surface layer of hard-baked mud and boulders D: deflation removes the coarse fragments leaving behind a layer of fine sediment (loess and mud)
- The greenhouse effect resulted hundreds of million years ago when _________. A: the atmosphere changed dramatically B: oxygen levels on the earth became lower C: the sea levels became lower greatly D: the sediment gave off enormous carbon and methane
内容
- 0
Which of the following can't you find on Mars today? A: atomsphere B: oceans C: ice D: sand
- 1
Which of the following statements are improper to break the ice？
- 2
Which of the following elements are not the five elements? A: Ice B: Wood C: Metal D: Electrisity
- 3
Which of the following statements are true？ （） A: RC4 is a stream cipher B: Stream ciphers require padding C: AES is a block cipher D: DES and 3DES are stream ciphers E: AES is a stream cipher F: AES， DES， and 3DES can be used as HMAC algorithms
- 4
The statement that "peach ice cream is better than chocolate ice cream" A: can be tested using the scientific approach. B: is a normative statement. C: is a positive statement. D: provides a basis for predicting which type of ice cream will exhibit the most sales.