The comment "This is logical" in Line 7 means ______.
A. there is no clear way to determine the extent of our ancestors' knowledge of plants
B. it is not surprising that early humans had a detailed knowledge of plants
C. it is reasonable to assume that our ancestors behaved very much like people in preindustrial societies
D. human knowledge of plants is well organized and very detailed
Electronic communication, due to its speed and broadcasting ability, is fundamentally different from paper-based communication such as letters and memos.(51)the other person's response time capability is(52)fast, email is more "conversational" than traditional methods of communication.
In a paper document, it is absolutely(53)to make everything completely clear and unambiguous because your audience may not have a chance to ask for(54). With email documents, however, your(55)can ask question immediately. Email, therefore like conversational speech, tends to be much informal and more ambiguous.
This is not always bad. It might not be a(56)expenditure of energy to slave(57)a message, making sure that your spelling is(58), your words eloquent, and that your grammar and punctuation are(59)reproach, if the point of the message is simply to inform. the recipient that your are ready to go to lunch.
Granted, you should put some effort into ensuring that your subjects(60)with your verbs, words are spelled correctly, avoid the mixing of metaphors, and so on.
Because of the(61)of vocal variation, gestures, and a shared environment, email is not as(62)a communication method as a face-to-face or even a telephone conversation. Your recipient may have difficulty(63)if you are being serious or joking, frustrated or euphoric. Thus, your email compositions should be different from both your speech and paper compositions.
With email, you cannot(64)anything about your correspondent's location, time, mood, marital(65)or age, This means, among other things, that you need to be very, very careful in phrasing your communications in order to prevent misunderstanding.
A. Because
B. Although
C. Whereas
D. When
Which of the following statements is NOT true according to the passage?
A. Tile pressure changes in the sand bed are the most important factor in the creation of beach.
B. The crest pushes water seaward.
C. People take it for granted that waves carry water and sand to the beach.
D. The high pressure under a crest forms strong whirlpools above the sand.
According to the passage, the general knowledge of botany began to fade because______.
A. people no longer value plants as a useful resource
B. botany is not recognized as a special branch of science
C. research is unable to keep up with' the increasing numbers of plants
D. direct contact with a variety of plants has decreased